Pure Substances and Mixtures

Matter is everything around us that takes up space and has mass.  We can classify matter into pure substances and mixtures.

Pure substances have only one type of particle. They can be made of elements or compounds.

Elements have only one type of atom. They are classified in the Periodic Table:

Do you know what these symbols mean?  Au,  Fe, H, O, Na, Cl, C

Compounds are made up of two or more elements combined in a particular way. For example: H20 or  NaCl. 

                     

     

To separate a compound, you must perform some type of chemical reaction.

A mixture is a combination of pure substances.   

In heterogeneous mixtures, we can see the different parts with the naked eye.

In homogeneous mixtures, you can't see the individual parts. It all looks the same:

Watch this short video: